HydroBASINS lev08 watershed · #1081659630
Bassin de Breede River
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 2 administrative regions : Cape Winelands, Overberg
Sub-basin area
2 495,6km²
Upstream area
5 463,8km²
Discharge
42,41m³/s
Mean elev.
547m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Breede River2138 km²
- Bassin de Hex River830 km²
2 dept-equivalent regions (GADM L2)
- 2487.2 km²99.7% of basin
- 7.6 km²0.3% of basin
17 intersecting protected areas
Riviersonderend Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
190.89 km² overlap
Langeberg-Wes Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
190.03 km² overlap
Matroosberg Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
144.52 km² overlap
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
73.77 km² overlap
Hawequas Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
43.24 km² overlap
Sunshine Nature Reserve
IUCN Not ReportedNature Reserve
26.50 km² overlap
Sangebethu Private Nature Reserve
IUCN Not ReportedNature Reserve
18.72 km² overlap
Skuilkrans Private Nature Reserve
IUCN Not ReportedNature Reserve
18.56 km² overlap
Vrolijkheid Nature Reserve
IUCN Not ReportedNature Reserve
17.02 km² overlap
8 more protected areassorted by overlap area
Drooge Riviers Berg Private Nature Reserve
IUCN Not ReportedNature Reserve
9.56 km² overlap
Dassieshoek Nature Reserve
IUCN Not ReportedNature Reserve
7.65 km² overlap
Doornkloof Private Nature Reserve
IUCN Not ReportedNature Reserve
5.63 km² overlap
Quaggas Berg Private Nature Reserve
IUCN Not ReportedNature Reserve
3.78 km² overlap
Viljoensdrift Nature Reserve
IUCN Not ReportedNature Reserve
2.90 km² overlap
Van Loveren Nature Reserve
IUCN Not ReportedNature Reserve
2.27 km² overlap
Greyton Natuurpark
IUCN Not ReportedNature Reserve
1.22 km² overlap
Drie Kuilen Private Nature Reserve
IUCN Not ReportedNature Reserve
0.12 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 202 distinct species · 132 965 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Breede River : 33 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 39 interactions GloBI sur 4 types (connectance 4.8%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
15,5°C
Annual rain
466mm
Moisture idx (CMI)
-0,64
Runoff
135mm/an
PET
1 336mm
AET
396mm
Mean slope
9,7°
Water table
637cm
Forest
9%
Crops
9%
Urban
1%
Protected
24%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)